GUI布局

边界布局

 

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package guiTest; //JFrame默认的是边界布局BorderLayout import java.awt.BorderLayout;   import javax.swing.JButton; import javax.swing.JFrame;   public class BorderLayoutDemo {     public static void main(String[] args) {         JFrame f = new JFrame("边界布局BorderLayout");         //JFrame的默认LayoutManager为BorderLayout     //  f.setLayout(new BorderLayout());//可以不写，默认的就是流式布局         JButton btn =  new JButton("北");         f.add(btn,BorderLayout.NORTH);                   btn=new JButton("南");         f.add(btn,BorderLayout.SOUTH);                   btn=new JButton("东");         f.add(btn,BorderLayout.EAST);                   btn=new JButton("西");         f.add(btn,BorderLayout.WEST);                   btn=new JButton("中");         f.add(btn,BorderLayout.CENTER);                   f.pack();//也可以用f.setSize(222,222);来进行设置         f.setVisible(true);         f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);     }   }

流式布局

 

 

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package guiTest;   import java.awt.BorderLayout; import java.awt.CardLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener;   import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel;   public class CardLayoutDemo {     private static JPanel p;     public static void main(String[] args) {         JFrame f = new JFrame("卡片布局CardLayout");         p=new JPanel();         //设置p的布局管理器为卡片布局CardLayout         p.setLayout(new CardLayout());                   //新建两个JPanel         JPanel p1 = new JPanel();         JPanel p2 = new JPanel();         JLabel lb = new JLabel("第一个面板");         p1.add(lb);//面板里面加标签         lb=new JLabel("第二个面板");         p2.add(lb);//面板里面加标签                   //将新建的两个JPanel面板添加到p中         p.add(p1,"first");         p.add(p2,"second");                   //设置默认显示first所对应的JPanel p1         ((CardLayout)p.getLayout()).show(p,"first");                   JButton btn = new JButton("改变面板");         btn.addActionListener(new ActionListener() {                           @Override             public void actionPerformed(ActionEvent e) {                 // TODO Auto-generated method stub                 //当点击'改变面板'时，显示second对应的JPanel p2                 ((CardLayout)p.getLayout()).show(p,"second");             }         });         f.add(btn,BorderLayout.NORTH);         f.add(p,BorderLayout.CENTER);         f.setSize(400,150);//f.pack();                   f.setVisible(true);         f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);     }   }

网格布局

 

 

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package guiTest;   import java.awt.FlowLayout;   import javax.swing.JButton; import javax.swing.JFrame;   public class FlowLayoutDemo {       public static void main(String[] args) {         // TODO Auto-generated method stub         JFrame f = new JFrame("流式布局FlowLayout");         f.setLayout(new FlowLayout());         for(int i=0;i<7;i++)         {             JButton btn=new JButton("Button"+i);             f.add(btn);         }         f.setSize(300,250);         //f.pack();默认边框设置宽度和长度刚刚好的样子         f.setVisible(true);         f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);       }   }

卡片布局

 

 

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package guiTest;   import java.awt.GridLayout;   import javax.swing.JButton; import javax.swing.JFrame;   public class GirdLayoutDemo {       public static void main(String[] args) {         JFrame f = new JFrame("网格布局GirdLayout");         //设置f的布局管理器为3行3列的GirdLayout组件间水平与垂直间距为5         f.setLayout(new GridLayout(3,3,5,5));         for(int i=1;i<10;++i)         {             JButton btn = new JButton(String.valueOf(i));             f.add(btn);         }         f.pack();         f.setVisible(true);         f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);               }   }